Use the diagram above to help answer the following equation.
The hanging mass (M2) is 10 kg and the mass on the incline (M1) is 25 kg. The incline is at a 60 degree angle. The plane has a coefficient of static friction of 0.10. What minimum mass would you need to add to reverse the direction of the Atwood machine?
A. 23 kg
B. 13 kg
C. 11.5 kg
D. 15 kg